叶面喷肥是柑橘栽培上的一项常规措施。通过这一途径供肥,肥效发挥得更快,肥料的利用率更高,在保花保果方面,常常可以收到满意的效果。但由此而引起的微环境的变化,对于柑橘害虫会产生什么样的影响是不容忽视的问题。为查清这些变化对柑橘全爪螨消长产生的影响,1989年3～6月我们在宜昌县小溪塔进行了试验。试验设0.5％尿素、0.2％磷酸二氢钾、1.5％复合肥(N、P、K各含15％)三种处理,清水对照。随机排列,重复4次。每周定时喷射1次,共喷3次。每周观察1次。每次观察,在每棵树的东、南、西、北、中五个方位各取叶片2张,共10张,统计橘全爪螨虫、卵数。处理前调查虫、卵基数,以每次的观察值与相应基数求得增殖率。增殖率=(虫卵观察值/基数-1)×100。结果表明: 1、尿素对柑橘全爪螨有明显的刺激作用。在 Foliar spray is a common practice in citrus cultivation. Through this approach for fertilizer, fertilizer efficiency to play faster, higher utilization of fertilizers, flowers and fruit protection, you can often receive satisfactory results. However, the microenvironment caused by this change can not be neglected for citrus pests. In order to find out the impact of these changes on the growth and decline of citrus red mite, we conducted the experiment in Xiaoxi Tower of Yichang from March to June 1989. The experiment set 0.5% urea, 0.2% potassium dihydrogen phosphate, 1.5% compound fertilizer (N, P, K each containing 15%) three kinds of treatment, water control. Randomly arranged, repeat 4 times. Spraying time a week, a total of 3 times spray. Watch once a week. Each observation, in each tree east, south, west, north, five leaves each take two, a total of 10, the statistics orange paws mites, the number of eggs. Investigate the worm, egg base before treatment, with each observation and the corresponding base to determine the proliferation rate. Proliferation rate = (egg observation / base -1) × 100. The results showed that: 1, urea has obvious stimulating effect on the citrus red mite. in